Insulator



Sept. 13, 1932. D, B. PALMER l 1,877,035

VINSULAIOR Filed Aug. .17, 1951 Patented Sept. 13, 1932 PATENT QFFICEDEWARD B. PALMER, OF AURORA, ILLINOIS INSULATOR Application led August17, 1931. Serial No. 557,621.

This invention relates to insulators of that type particularly adaptedto deflect currentcarrying cables of electrical distribution sys temspast trees or other objects intervening in the direct line of thecables.

Ordinarily, such insulators are objection able in that in some instancesthey necessitate kinks or bends being formed in the cables and, in otherinstances, being sectional, are prone to become loose, and even thesections become separated, while, in other instances, where cabe clampsare employed, injury to the cables themselves often results.

To obviate the above and other objects, the present invention providesan insulator in which one or more cables, or even stranded two-wirecables, may be carried past obstructing objects safely without bends orkinks and without injury to the cables while, at the same time, itiveclamping means are provided for holo.; g the sections of the insulatorin permanent assembly.

With the above and other objects in view the invention consists incertain novel details of construction and combinations of partshereinafterfullv described and claimed, it being understood that variousmodifications n'iay be resorted to within the scope of the appendedclaims without departing from the spirit or sacrificing any of theadvantages of the invention.

In the accompanying drawinfy forming part of this specification,

Figure 1 is a side elevation showing the insulator in applied position,

Fig. 2 is a longitudinal sectional. view through the insulator, and

F 3 is a cross sectional view taken on the line 3-3 of Fig. 2.

Referring now to the drawing in which like characters of referencedesignate similar parts in the various views, designates the insulatortube which is preferably formed of Wood or other suitable insulatingmaterial. The tube is cylindrical in cross section, as best shown inFig. 3, and is divided longitudinally to provide separable,semi-cylindrical sections which permit of the tube being applied to asingle stranded two-wire cable or to a pair of cables or a plurality ofcables, as desired.

As best shown in Fig. 2, the tube 10 is provided near the ends with apair of annular countersinlrs 11 which form seats for split ring clamps12, best shown in Fig. 3. The ends of each clamp are directed parallelwith each other and removably secured together by a bolt 13. The seats11 prevent the clamps from slipping longitudinally of the tube. Then thebolts 13 are tightened, the ring clamps l2 are contracted tightly in theseats and hold the semi-cylindrical sections of the tube in rigid,permanent assembly.

Each ring clamp 1Q is provided, opposite the terminals thereof, with aset screw 14 which is threaded through the clamp and Passed through alongitudinal slot 15 formed in the tube 10. The tip of the set screw isequipped with a clamp plate 16 which is provided with a rounded face 17to receive the cable 18. The plate is swivelly attached to the set screwby means of a pin 19 which is integral with the set screw and isreceived in an opening 20 in the plate and may be then headed up, asshown at 21, to prevent escape of the plate. The swivel plate 16 permitsof the set screw being advanced or retracted without disturbing theposition of the plate 16 on the cable, so that the cable insulation isnot injured during application or removal of the set screw.

It will be observed that when the set screws 14 are in operativeposition, the walls of the slots 15 form stops which hold the set screwsagainst any radial movement should the clamps become accidentallyloosened, so that the cables are at all times maintained by the setscrews in proper spaced relationship in the insulator 10.

lhile the invention, in Fig. 1, is shown as a tree insulator, it will beunderstood that such use is purely illustrative and in no way limiting.

Having thus described the invent-ion, I claim:

1. A cable deflector comprising a tubular insulator formed oflongitudinal sections adapted to receive the cable between them, a pairof split ring clamps surrounding the sections, a set screw carried byeach clamp, and a clamp plate swivelly mounted on the end of each setscrew for clamping the cable against movement in the insulator, therebeing annular seats formed in the sections of the insulator to receivethe split rings and prevent longitudinal creeping of the rings 1upon theinsulator', there being slots formed longitudinally in the sections ofthe insulator A`. receiving the set screws, the walls of the slotsforming stops to prevent radial movement of the set screws should thesplit rings become loose whereby the set screws permanently maintain thecables in position in the insu- 115 later.

2. A cable detlector comprising a tubular insulator providedwithlongitudinal slots at the ends and being formed of a plurality oflongitudinal semi-cylindrical sections, a plurality of split ring clampsseated in annular grooves formed in the sections and adapted to hold thesections assembled in intimate contact with each other, each clamphaving the terminals disposed parallel and coni nected together by abolt, a set screw passed through each clamp diametrically opposite saidbolt and passed through one of said longitudinal slots in the insulator,and a swivel plate operatively connected to the end of each 30 set screwfor clamping the cable stationary in the bore of the insulator, saidclamp plate having a rounded face adapted to engage the cable, the wallsof the slot-s forming stops to prevent radial movement of the set screwsshould the split ring clamps become loosened. 8. A cable detlectorcomprising a tubular insulator divided longitudinally to providesemi-tubular sections, spaced split ring clamps encircling the sectionsand binding 0 the sections together, a set screw threaded through eachclamp and passing into the bore ot the insulator, and a swivel plate onthe tip of each set screw having a rounded :tace to engage the cable andclamp the cable against the inner surface of the insulator.

In testimony whereof I afiix my signature.

DEVARD B. PALMER. [L s]

